NaniteStreamOut.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "RenderGraphBuilder.h"
#include "RenderGraphResources.h"
 
#include "RHIGPUReadback.h"
 
#include "CoreMinimal.h"
 
class FGlobalShaderMap;
 
namespace Nanite
{
    struct FStreamOutRequest
    {
        uint32 PrimitiveId;
        uint32 NumMaterials;
        uint32 NumSegments;
        uint32 SegmentMappingOffset;
        uint32 AuxiliaryDataOffset;
        uint32 MeshDataOffset;
    };
 
    struct FStreamOutMeshDataHeader
    {
        uint32 NumClusters;
        uint32 VertexBufferOffset;
        uint32 IndexBufferOffset;
        uint32 NumVertices;
        uint32 NumIndices;
    };
 
    struct FStreamOutMeshDataSegment
    {
        uint32 NumIndices;
        uint32 FirstIndex;
    };
 
    /*
    * Stream out nanite mesh data into buffers in a uncompressed format
    */
    void StreamOutData(
        FRDGBuilder& GraphBuilder,
        FGlobalShaderMap* ShaderMap,
        FSceneUniformBuffer &SceneUniformBuffer,
        float CutError,
        uint32 NumRequests,
        FRDGBufferRef RequestBuffer,
        FRDGBufferRef SegmentMappingBuffer,
        FRDGBufferRef MeshDataBuffer,
        FRDGBufferRef AuxiliaryDataBuffer,
        FRDGBufferRef VertexBuffer,
        uint32 MaxNumVertices,
        FRDGBufferRef IndexBuffer,
        uint32 MaxNumIndices
    );
} // namespace Nanite